Like you, I had seen a ton of snippets of this movie, but had never watched it all the way through, so I decided last night (after a couple of cocktails) to pour myself a White Russian and watch the whole thing.
I gotta say that, although the movie features an all star case and has a few funny moments, there is no discerible plot, and it dragged on for what seemed like forever. I abstained from turning it off because I had vowed to myself to watch the whole thing.
My conclusion: it reminded me of The Blair Witch Project: a movie with a ton of buzz, but which ultimately turned out to suck ballz. I would have rather watched a You Tube special on Tara Reid's botched boob job. (Tara was one of the actors in this movie, and she got off one of the better lines: "I'll suck your c##k for $1,000."))